T10 carbon steel is a high-carbon tool steel that is known for its strength and toughness. It is commonly used in the production of high-quality swords, knives, and other bladed tools. The exact properties of T10 steel can vary depending on factors such as heat treatment and manufacturing processes. However, in general, T10 carbon steel exhibits the following characteristics:

1. Hardness: T10 steel can achieve high levels of hardness when properly heat-treated, typically ranging from 58 to 62 HRC (Rockwell hardness scale). This high hardness allows the blade to hold a sharp edge and resist deformation during use.
2. Strength: T10 steel has excellent strength properties, making it suitable for applications that require high resistance to wear and impact. It can withstand heavy use and impacts without bending or breaking.
3. Toughness: T10 steel offers good toughness, which refers to its ability to absorb energy and withstand impact without fracturing. This characteristic is important for blades that may be subjected to bending or twisting forces.
4. Edge Retention: T10 steel has the ability to hold an edge well, allowing for effective cutting and slicing. Proper sharpening and maintenance practices are necessary to maintain the blade's cutting performance.

It's important to note that the performance and durability of a blade made from T10 carbon steel are not solely determined by the steel itself but also by other factors such as the blade's geometry, heat treatment quality, and the skill of the swordsmith. Proper heat treatment and craftsmanship are crucial to realizing the full potential of T10 steel.

When considering a sword or knife made from T10 carbon steel, it's advisable to research the reputation and expertise of the swordsmith and seek reputable sources or recommendations to ensure the quality and authenticity of the blade.